public PersistentFSMBaseTState, TData, TEventStateFunction Using(
	Func<PersistentFSMBaseTState, TData, TEventState, PersistentFSMBaseTState, TData, TEventState> andThen
)

member Using : 
        andThen : Func<PersistentFSMBaseTState, TData, TEventState, PersistentFSMBaseTState, TData, TEventState> -> PersistentFSMBaseTState, TData, TEventStateFunction